File list (Check if you may need any files):
machine-learning-ex4
....................\ex4
....................\...\checkNNGradients.m
....................\...\computeNumericalGradient.m
....................\...\debugInitializeWeights.m
....................\...\displayData.m
....................\...\ex4.m
....................\...\ex4data1.mat
....................\...\ex4weights.mat
....................\...\fmincg.m
....................\...\lib
....................\...\...\jsonlab
....................\...\...\.......\AUTHORS.txt
....................\...\...\.......\ChangeLog.txt
....................\...\...\.......\LICENSE_BSD.txt
....................\...\...\.......\README.txt
....................\...\...\.......\jsonopt.m
....................\...\...\.......\loadjson.m
....................\...\...\.......\loadubjson.m
....................\...\...\.......\mergestruct.m
....................\...\...\.......\savejson.m
....................\...\...\.......\saveubjson.m
....................\...\...\.......\varargin2struct.m
....................\...\...\makeValidFieldName.m
....................\...\...\submitWithConfiguration.m
....................\...\nnCostFunction.m
....................\...\predict.m
....................\...\randInitializeWeights.m
....................\...\sigmoid.m
....................\...\sigmoidGradient.m
....................\...\submit.m
....................\...\token.mat
....................\ex4.pdf